PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The chances of this occurring are orders of magnitude smaller than getting 0 back from a selector call to nil.There is a reason why uncaught exceptions crash the app, and that reasoning is that it is better to shut down the program than to allow it to behave unpredictably and corrupt data.
http://www.w3.org/ns/prov#wasQuotedFrom
  • blogspot.nl